$14\mathrm{.}5$ Design an air stripper to treat:

$100\frac{g}{L}$ TCE

$80\frac{g}{L}$ benzene

$90\frac{g}{L}$ toluene

$98\frac{g}{L}$ chloroform

to $5\frac{g}{L}.$ The design flow rate is $4000\frac{m^3}{?}$ day $(1\mathrm{.}05\{$:$mgd).$ Use $51mm(2in)$ Tri$-$Pack packing with an air$-$to$-$water ratio of $35$:$1,$ pressure drop of $50\frac{N}{m^2}\frac{?}{m},$

$9\mathrm{.}404c\frac{m^2}{sec,D_L}=6{10}^{-6}c\frac{m^2}{sec}$ at a temperature of $20C,$ and $D_G=9\mathrm{.}404{10}^{-2}c\frac{m^2}{sec}.$